DXF Export Guide

How to export CAD-ready geometry from SteelCalculator to AutoCAD, Revit, Tekla, and other CAD software.

SteelCalculator exports structural geometry as DXF R12 files -- the most widely compatible CAD interchange format. This guide covers what geometry is available, how to export it, and how it compares to other structural engineering software.

This page is an educational explainer. It describes how DXF export works in SteelCalculator, what you get, and when to use it. It does not provide engineering design advice or replace CAD software documentation.

What DXF Export Provides

DXF (Drawing Exchange Format) is Autodesk's open interchange format for CAD data. SteelCalculator generates valid, layer-coded DXF R12 files that open in any CAD application. Each export type targets a specific use case:

Bolt Layout DXF

Exported from the bolt group calculator and connection design pages. Includes:

• Bolt hole positions -- circles at exact center coordinates (diameter matches selected bolt size)
• Plate outline -- rectangular boundary of the connected plate with dimensions
• Edge distances and pitch/gauge -- accurately scaled from your input values
• Layer coding -- BOLTS layer (yellow) for holes, PLATE layer (white) for plate boundary

Plate Geometry DXF

Exported from base plate, gusset plate, and end plate calculators. Includes:

• Plate outline -- full plate rectangle with width x height
• Bolt hole pattern -- all holes at calculated positions
• Weld symbols -- schematic weld indicators on the WELD layer (red) when weld data is present
• Dimension annotations -- text labels for key dimensions

Frame Geometry DXF

Exported from the portal frame designer hub pipeline. Includes:

• Member centerlines -- LINE entities on the MEMBERS layer (cyan), one line per frame member
• Joint coordinates -- labeled nodes at each connection point on the JOINTS layer (green)
• Section labels -- TEXT annotations showing the assigned section size for each member
• Scaled coordinates -- exported in millimeters (multiplied from the internal meter representation)

Connection Detail DXF

Exported from the connection design page (Stage 6 of the designer hub). Includes:

• Connection plate geometry -- full plate with accurate dimensions
• Bolt group layout -- all fasteners at correct positions
• Weld indicators -- fillet weld symbols on the WELD layer
• Component labels -- text annotations identifying each connection component

How to Export

1. Complete your calculation (any calculator or designer hub pipeline stage that supports DXF).
2. If you are a Pro or Pro Plus user, find the Export Results panel near the results.
3. Click the DXF button. The file downloads immediately as a .dxf file.
4. Open the file in your CAD application. All geometry appears on named layers with correct colors.

For portal frame geometry, DXF export is available on the Results page (Stage 7). For connection details, it is available on the Connection Design page (Stage 6).

If you are on the Free tier, the Export Results panel shows an upgrade prompt. Create a free account and start a 14-day Pro trial to access DXF export.

Layer Convention

SteelCalculator DXF exports use these named layers for organized CAD import:

All layers are created automatically in the DXF TABLES section, so they appear as named layers in your CAD application.

Opening DXF Files in Common CAD Software

AutoCAD / AutoCAD LT: File > Open > select the .dxf file. All layers and geometry import directly.

Revit: Insert tab > Import CAD > select the .dxf file. Choose "Current View Only" to place the geometry in your active view. The import can be used as a reference for modeling structural elements.

Tekla Structures: File > Import > DXF. Use the import as a reference model or construction object.

Advance Steel: Use the DXF import to bring in connection details as reference geometry for detailing.

BricsCAD / DraftSight / LibreCAD: File > Open. DXF R12 is fully supported with correct layer mapping.

QCAD (free, open source): File > Open. All entity types (LINE, CIRCLE, TEXT) render correctly.

Comparison: DXF Export Across Competitors

Most structural engineering calculators do not offer free DXF export, and the ones that do charge significantly more:

SteelCalculator is one of very few web-based structural tools offering DXF export at all, and the only one at the $49/mo price point with layer-coded R12 output.

Calculators That Support DXF Export

These SteelCalculator tools generate DXF-exportable geometry:

• Bolt Group Capacity -- Bolt pattern DXF with hole positions and plate outline
• Portal Frame Designer -- Complete frame geometry DXF (members, joints, sections)
• Connection Design -- Connection detail DXF (plates, bolts, welds)
• Base Plate Design -- Base plate geometry with anchor bolt pattern
• Gusset Plate Design -- Gusset plate outline with bolt layout
• Column Splice -- Splice plate geometry DXF
• Beam Capacity Calculator -- Export result data; DXF available for connected designs
• Column Capacity Calculator -- Export result data; DXF available for base plate designs

Limitations and Important Notes

• DXF export is a Pro feature. Free users can run all calculations but cannot export DXF files. Start a 14-day free trial of Pro to test DXF export with no credit card required.
• R12 format only. This is intentional -- R12 has the widest compatibility across all CAD software. If you need a newer DXF version, open the R12 file in your CAD application and save-as a newer format.
• Geometry only. DXF exports contain line, circle, and text geometry. They do not include 3D solids, rendering materials, or BIM metadata.
• Millimeter scaling. All coordinates in the DXF file are in millimeters. This follows CAD convention regardless of your calculator's display unit preference.
• Not for fabrication. DXF exports are schematic reference geometry. They are suitable for layout reference, drafting overlays, and coordination. Verify all dimensions against your calculation output before using for fabrication drawings.

Step-by-Step: Export a Bolt Layout to AutoCAD

1. Open the Bolt Group Calculator.
2. Enter your bolt pattern: number of rows, columns, bolt size, pitch, gauge, and eccentricity.
3. Click "Calculate." Review the C-coefficient and per-bolt capacity results.
4. Scroll to the Export Results panel. Click DXF.
5. The file downloads as steelcalc-bolt-group.dxf (or a connection-specific filename).
6. Open AutoCAD. File > Open > select the downloaded .dxf.
7. The bolt holes appear on the BOLTS layer (yellow), the plate on the PLATE layer (white).
8. Use the geometry as a reference overlay for your connection detail drawing.

Related Pages

• Guides and Checklists
• Connection Design Methods Compared
• Bolted Connection Design Checklist
• Weld Design Checklist
• How to Verify Structural Calculations
• Pricing Plans
• Disclaimer (educational use only)

Disclaimer (educational use only)

This page is provided for general technical information and educational use only. It does not constitute professional engineering advice, a design service, or a substitute for an independent review by a qualified structural engineer. DXF files generated by SteelCalculator are schematic reference geometry and must be reviewed and verified by a qualified professional before use in any construction project. The site operator provides this content "as is" and "as available" without warranties of any kind.